iOS：由于未捕获的异常“NSInvalidArgumentException”而终止应用程序，原因：“JSON 写入 (_NSInlineData) 中的类型无效”答案

【问题标题】：iOS:Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Invalid type in JSON write (_NSInlineData)'iOS：由于未捕获的异常“NSInvalidArgumentException”而终止应用程序，原因：“JSON 写入 (_NSInlineData) 中的类型无效”
【发布时间】：2014-09-18 23:35:08
【问题描述】：

NSData *imgData;
if (!_groupImageView.image)
{
    imgData=[NSData dataWithData:UIImagePNGRepresentation([UIImage imageNamed:@"Replay.png"])];
}
else
{
    imgData=[NSData dataWithData:UIImagePNGRepresentation(_groupImageView.image)];
}
NSError *error;
NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
NSURLSession *session = [NSURLSession sessionWithConfiguration:configuration delegate:self delegateQueue:nil];
NSURL* url = [NSURL URLWithString:[ NSString stringWithFormat:@"%@groups/create",[sharedObj getSiteUrl]]];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url
                                                       cachePolicy:NSURLRequestUseProtocolCachePolicy
                                                   timeoutInterval:60.0];
[request addValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
[request addValue:@"application/json" forHTTPHeaderField:@"Accept"];
[request setHTTPMethod:@"POST"];
NSDictionary *mapData = [[NSDictionary alloc] initWithObjectsAndKeys:sharedObj.acessToken, @"tocken",  _txtGroupName.text, @"name",imgData, @"image",  nil];
NSData *postData = [NSJSONSerialization dataWithJSONObject:mapData options:0 error:&error];
[request setHTTPBody:postData];

我在尝试对图像数据进行 JSON 编码时遇到此异常，

由于未捕获的异常而终止应用程序 'NSInvalidArgumentException'，原因：'JSON 写入中的类型无效 (_NSInlineData)'

【问题讨论】：

您有问题吗？
（访问 json.org 并学习 JSON 语法。只需 5-10 分钟。当你在那里时，请注意没有对应于 NSData 对象的 JSON 实体。）

标签： ios json nsurlsession

【解决方案1】：

或者通过使用 base64EncodedString 将 imgData 更改为字符串；

NSData *imgData;
if (!_groupImageView.image)
{
    imgData=[NSData dataWithData:UIImagePNGRepresentation([UIImage imageNamed:@"Replay.png"])];
}
else
{
    imgData=[NSData dataWithData:UIImagePNGRepresentation(_groupImageView.image)];
}

//把图片数据改成base64EncodedString

NSString *base64=[imgData base64EncodedStringWithOptions:0];
NSError *error;
NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
NSURLSession *session = [NSURLSession sessionWithConfiguration:configuration delegate:self delegateQueue:nil];
NSURL* url = [NSURL URLWithString:[ NSString stringWithFormat:@"%@groups/create",[sharedObj getSiteUrl]]];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url
                                                       cachePolicy:NSURLRequestUseProtocolCachePolicy
                                                   timeoutInterval:60.0];
[request addValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
[request addValue:@"application/json" forHTTPHeaderField:@"Accept"];
[request setHTTPMethod:@"POST"];

//将base64添加为键“image”的值

NSDictionary *mapData = [[NSDictionary alloc] initWithObjectsAndKeys:sharedObj.acessToken, @"tocken",  _txtGroupName.text, @"name",base64, @"image",  nil];
NSData *postData = [NSJSONSerialization dataWithJSONObject:mapData options:0 error:&error];
[request setHTTPBody:postData];

【讨论】：